Hi Marek,
On Fri, Mar 22, 2019 at 1:33 PM Marek Vasut <marek.vasut@xxxxxxxxx> wrote:
> On 3/22/19 1:29 PM, Geert Uytterhoeven wrote:
> > On Fri, Mar 22, 2019 at 1:18 PM Lorenzo Pieralisi
> > <lorenzo.pieralisi@xxxxxxx> wrote:
> >> On Fri, Mar 22, 2019 at 01:09:13PM +0100, Marek Vasut wrote:
> >>> On 3/22/19 12:31 PM, Lorenzo Pieralisi wrote:
> >>>> On Sun, Feb 17, 2019 at 02:24:41PM +0100, marek.vasut@xxxxxxxxx wrote:
> >>>>> From: Kazufumi Ikeda <kaz-ikeda@xxxxxxxxxxxxx>
> >>>>>
> >>>>> Reestablish the PCIe link very early in the resume process in case it
> >>>>> went down to prevent PCI accesses from hanging the bus. Such accesses
> >>>>> can happen early in the PCI resume process, in the resume_noirq, thus
> >>>>> the link must be reestablished in the resume_noirq callback of the
> >>>>> driver.
> >>>>
> >>>> This looks like a fix (most likely fixing initial S2R support, please
> >>>> help me chase the commit ID), should we consider it for stable kernels ?
> >>>>
> >>>> Without it I understand S2R is actually broken on platforms with this
> >>>> host bridge.
> >>> I don't think this ever worked, so it's hard to find a Fixes: commit for
> >>> this.
> >>
> >> If we want to send it to stable kernels we have to select which versions
> >> we are covering. I think the only options for a Fixes: tag are either
> >> the initial S2R support commit for the platforms this driver runs on
> >> or the initial driver commit that harks back to v3.16 AFAICS.
> >
> > This only started to become an issue when support for arm64 platforms
> > was added, where PSCI may power down the SoC, right?
>
> Wouldn't you also hit this on ARM32 LPAE ones ?
This is about the PCI link issue on system resume, right?
> > Hence:
> > Fixes: e015f88c368da1e6 ("PCI: rcar: Add support for R-Car H3 to pcie-rcar")
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
